i have yet to find a solution.
the last time i did have the rear differential ‘serviced’ was at a valvoline oil change place about a year ago.
i was going to poke around subaruforester.org and see about changing the fluid myself. i hate those quick oil change places and have decied to do my best to avoid them.
logically, bear in mind i AM NOT A MOTORHEAD, it seems the fluid is fine at cold temps, then after warming up maybe it breaks down and no longer works as it should. sorta makes sense. gets cold and more viscous and the cycle continues.
a local VW specialty place said he’d take a look at it, but didn’t say a price. and neither did my regular subaru specialty place (neither one dealerships). but as i mentioned before my subaru place didn’t seem to want to fix it.
it sounds horrible. people look it’s so loud.
luckily i have not been driving it much as of late just due to biking more and having another car to use for two weeks.
please post what you discover!